#include<bits/stdc++.h> using namespace std; int main(){ int a,b,c; double m; cin>>a>>b>>c; m=(a+b+c)/3.0; cout<<a+b+c<<endl; printf("%.1f",m); return 0; }

#include<bits/stdc++.h>
using namespace std;
int main(){
    int x,y,z;
    cin>>x>>y>>z;
    cout<<x+y+z<<endl<<fixed<<setprecision(1)<<(x+y+z)*1.0/3;
    return 0;
}